The incident took place yesterday in China's Guangxi Zhuang autonomous region, state-run Xinhua news agency reported.
According to the report, the police recieved a call yesterday afternoon saying a child has fallen from a room of the building, following which the boy was taken to the hospital where he later died.
The man was later identified as Lu, who confessed that he threw the child off the building because of a "romantic dispute" with the kid's mother.
